The Autonics TC4S-N4R is a compact DIN-rail temperature controller with a DIN size of W48 × H48 mm and a 4-digit 7-segment LED display. It supports multiple control methods including ON/OFF, P, PI, PD, and PID, and accepts input from thermocouples K (CA), J (IC), and L (IC), as well as RTDs such as DPt100 Ω and Cu50 Ω, with a sampling cycle of 100 ms. The control output can be a relay (250 VAC, up to 3 A) or an SSR drive (12 VDC specialstring) supporting ON/OFF, phase, and cycle control. Power is supplied from 100–240 VAC at 50/60 Hz. It provides a proportional band from 0.1 to 999.9℃/℉, an integral time from 0 to 9999 seconds, a derivative time from 0 to 9999 seconds, a control period from 0.5 to 120.0 seconds, and a manual reset from 0.0 to 100.0%. Environmental specifications indicate an ambient operating temperature range of -10 to 50℃ with storage from -20 to 60℃, and ambient humidity from 35 to 85% RH with storage in the same range. The insulation type is either double insulation or reinforced insulation, with a marked specialstring indicating dielectric strength between the measuring input part and the power part: AC power 2 kV, AC/DC power 1 kV. This combination of flexible inputs, versatile control options, and robust insulation makes the TC4SP-14R suitable for reliable temperature control across a wide range of industrial applications.